Last Updated 1 day ago
Definition:
Dulling spray is a removable spray applied to surfaces on set to reduce glare, shine, and unwanted reflections. It is commonly used to matte down glossy objects so they photograph cleanly under film and television lighting.
Dulling spray is intended as a temporary reflection-control treatment, but removal and surface compatibility depend on the product, finish, application and time left in place. Follow the instructions and test a hidden area before treating a visible or valuable surface.
What Dulling Spray Is Used For
Dulling spray is most often applied to objects that reflect light in distracting or uncontrolled ways. Common uses include:
- Shiny props such as phones, picture frames, appliances, and tools
- Glass surfaces that catch hot reflections
- Metal fixtures or hardware
- Plastics with a high-gloss finish
- Finished wood or lacquered furniture
Its purpose is not to hide objects, but to control how they interact with light and the camera.
Why It Matters on Set
Cameras and lighting exaggerate reflections. What looks fine to the naked eye can turn into blown highlights, visible crew reflections, or distracting glare once lit and framed.
Dulling spray helps:
- Eliminate hot spots
- Reduce mirror-like reflections
- Improve exposure consistency
- Give the cinematographer more control over contrast and highlights
- Save time by avoiding constant lighting adjustments
It is often faster and cleaner to dull an object than to re-rig lights or flag reflections endlessly.
Who Uses It
Dulling spray is typically handled by:
- Props department
- Art department or set dressers
- Camera or lighting departments (with permission)
It should never be applied casually. Many surfaces, especially rented props or hero items, require approval before spraying.
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Dulling Spray vs. Matte Finishes
Dulling spray is temporary. Matte paint or surface treatment is permanent.
That distinction matters. Dulling spray is used when:
- The item must be returned unchanged
- The look may need to be adjusted shot to shot
- Only specific angles need treatment
Once applied, it can usually be removed with water or gentle cleaning, depending on the product.
Common Mistakes
Overapplication is the most common issue. Heavy spray can look chalky, uneven, or visibly artificial on camera. Uneven coverage can also create patchy highlights that are worse than the original reflection.
Another mistake is spraying without communicating with other departments. A dulled object affects lighting ratios, color response, and continuity.
On-Set Reality
Dulling spray is one of those quiet problem-solvers that rarely gets credit. When it’s used well, nobody notices. When it’s not used and should have been, everyone notices.
It is a standard part of the on-set toolkit, especially in commercial, product-heavy, or high-gloss environments.
Alternatives
In practice, some crew use cheap aerosol spray deodorant as a substitute for dulling spray when proper products aren’t available. Lightly misted, certain spray deodorants leave a matte residue that can knock down glare and reflections on glass, metal, and glossy props.
This is a workaround, not a best practice. Results vary by brand, and “invisible” or clear sprays usually do nothing. Only low-cost sprays that visibly dull the surface tend to work at all. Always test first and get approval before applying anything to props, rentals, or hero items.
It works because the residue behaves similarly to dulling spray, not because it’s designed for the job.
In Short
Dulling spray can help control unwanted reflections when moving the source, flagging or changing the camera angle is impractical. Treat temporary removal as product- and surface-dependent, rather than guaranteed. Krylon’s product guidance is one example of the manufacturer information to check.
Related Terms
- Glare – Unwanted reflected light hitting the camera
- Reflection – Light bouncing off a surface into the lens
- Props – Objects used on set by actors or as set elements
- Set Dressing – Environmental elements placed by the art department
- Flag – Tool used to block or shape light
- Diffusion – Material used to soften light
- Continuity – Visual consistency across shots and scenes
Browse the filmmaking dictionary or explore terms beginning with D.